Grease a 14 x 21cm loaf pan.Combine sifted flour, polenta, sugar, cumin and chilli in a bowl.Stir in capsicums, parsley, onions, yoghurt, egg and oil.Spoon mixture into well greased pan.Sprinkle liberally with parmesan cheese and pat cheese into top of mixture.Bake in preheated 180 C oven for 40 minutes or until well browned and firm.Stand for 5 minutes before turning out on wire rack to cool.